Messages in this thread | | | Date | Thu, 7 Dec 2006 02:24:30 +0100 (CET) | From | Roman Zippel <> | Subject | Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it |
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Hi,
On Wed, 6 Dec 2006, Linus Torvalds wrote:
> > > Any _real_ CPU will simply never care about _anything_ else than just the > > > size of the datum in question. > > > > ..or alignment which a dedicated atomic type would allow to be attached. > > Can you give any example of a real CPU where alignment matters? > > Sure, it needs to be naturally aligned, but that's true of _any_ type in > the kernel. We don't do unaligneds without "get_unaligned()" and friends.
m68060 produces a trap for unaligned atomic access, unfortunately standard alignment is smaller than this.
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